Boat tower



FIG. 1 is a top rear right side perspective view of my new boat tower;

FIG. 2 is a right side elevation;

FIG. 3 is a left side elevation;

FIG. 4 is a top plan view;

FIG. 5 is a rear elevation;

FIG. 6 is a front elevation; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a boat tower, as shown and described. 